Matthew Poole and continuators on John 3:7

7 Marvel not that I said unto thee, Ye must be born again .

There is a twofold Admiration; that which is joyn'd with Infidelity, and that which is the effect of Faith. Our Saviour forbids Nicodemus to marvel at the Doctrine of Regeneration, as strange and incredible, upon an imaginary impossibility supposed by him of the thing it self. But he that believes, will judg that supernatural work of the Spirit, whereby a sinful man is made a partaker of the Divine Nature, worthy of the highest Admiration. And what our Saviour had said in the general before, That a man must be born again; he now particularly applies to Nicodemus, with those of his order, Ye must be born again. For Nicodemus would easily consent that the Pagans, and possibly the vulgar Iews had need of Regeneration, to partake of the Kingdom of God; but that the Doctors of the Law, (of which number himself was) esteemed the Lights of the World, should be under the same necessity, was astonishing to him. Therefore, our Saviour to undeceive and humble him, saith, Ye must be born again, for that all are defiled with the corruption that is universal to mankind.

Marginal references: Or, from above.